The Waved Cynanchum is more remarkable for novelty than beauty; yet, as an addition to our volubilous exotics, it possesses sufficient elegance to render it worthy our attention: especially as climbing plants have of late years become quite fashionable in most of the best conservatories in the vicinity of London. As a species, we conceive it to be perfectly nondescript, although it should seem to possess several characters in common with Cynanchum reticulatum, and C. undulatum of Willdenow, &c.; both of which are known to us, but are described as having ovate, or oblong, not heart-shaped leaves. C. reticulatum is also a native of the same country, the East Indies; from whence seeds of the undatum were brought in the year 1803 by Captain Thomas Hardwicke; and were raised in the collection of the Marquis of Blandford, at White Knights, Berks, where they flowered last July; when that nobleman obligingly communicated to us the specimen from which the annexed figure was made. The Waved Cynanchum is a hot-house plant, and requires nearly the same treatment as Pergularia minor of our 184th plate. [Illustration] PLATE CCCCXI. PSORALEA SPICATA. _Spiked-flowered Psoralea._ CLASS XVII. ORDER IV. _DIADELPHIA DECANDRIA._ Two Brotherhoods. Ten Chives. ESSENTIAL GENERIC CHARACTER. CALYX longitudine leguminis. Stamina diadelpha. Legumen monospermum subrostratum evalve. EMPALEMENT the length of the pod. Chives diadelphous. Pod one-seeded roundish and valveless. SPECIFIC CHARACTER, &C. PSORALEA, foliolis obovatis recurvato-mucronatis subtus punctatis, spica terminali oblonga. _Willd. Sp. Pl. 3. 1345._ PSORALEA, with leaflets inversely egg-shaped, recurvedly mucronated and dotted beneath, and an oblong terminal spike of flowers. REFERENCE TO THE PLATE. 1. The empalement. 2. A standard. 3. One of the wings. 4. The keel. 5. The chives and pointal. 6. The seed-bud and pointal. The spiked-flowered Psoralea is a shrubby plant, and rises to the height of a foot or two; producing its spikes of flowers in the months of July and August, at the ends of its branches. It is a native of the Cape of Good Hope, and in this country is found to succeed very well in any green-house which has a flue to keep out the frost: and is propagated by seeds, and also by cuttings if carefully managed. Although not a very newly-introduced plant, it is certainly not a frequent one in our gardens; indeed we do not recollect having ever seen it in any collection, except the Nursery of Messrs. Whitley and Brames, Old Brompton; where our drawing was made some time since; and where it was considered and treated as a new species: which, however, as appears by our synonym above given, is not the case. [Illustration] PLATE CCCCXII. CALENDULA VISCOSA. _Viscous Marygold._ CLASS XIX. ORDER II. _SYNGENESIA POLYGAMIA NECESSARIA._ Tips united. Necessary Polygamy. ESSENTIAL GENERIC CHARACTER.